text: #ifndef WRITE_XML_UTILS_H
  #define WRITE_XML_UTILS_H
  
  /********************************************************************
   * Include header files that are required by function declaration
   *******************************************************************/
  #include <fstream>
  #include "circuit_library.h"
  
  /********************************************************************
   * Function declaration
   *******************************************************************/
  void write_xml_attribute(std::fstream& fp, 
                           const char* attr,
                           const char* value);
  
  void write_xml_attribute(std::fstream& fp, 
                           const char* attr,
                           const bool& value);
  
  void write_xml_attribute(std::fstream& fp, 
                           const char* attr,
                           const float& value);
  
  #endif
  